في الفيديو ده هنتعرف على ظاهرة فيزيائية جديدة وهى التأثير الكهروضوئي. اتفرج علي الفيديو و اعرف يعني ايه التأثير الكهروضوئي و ايه هي اهم خصائص التأثير الكهروضوئي.
Amr Allam assumed his role as Group Co-Chief Executive Officer for Hassan Allam Holding in 2010. He spearheaded the dynamic evolution of the Group’s corporate strategy and expansion through new investments, including launching Hassan Allam Utilities, Hassan Allam Holding’s investment and development arm, which currently has assets under management exceed bal contractors and engineering firms and continues to be the leading contractor and investor for strategic projects.
